The problem a bridge mortgage tries to solve
A buyer may find the next home before completing the sale of the current one. Bridge finance coordinates the equity and debt across both properties for a temporary period.
It does not remove sale risk. The structure depends on valuations, existing mortgage balance, new purchase cost, household affordability and a credible exit through sale or other repayment.
Calculate net equity, not listing price
Start with a conservative current-home value and subtract the outstanding mortgage, sale costs, taxes where relevant and any amount needed to complete the new purchase. An estate-agent asking price is not cash available today.
Test a slower sale and lower price. If the transaction fails under a modest downside, the bridge may be too tight.
Understand interim payments
The product may use interest-only, reduced or combined payments for a period, but conditions vary. Ask what is payable before sale, after the temporary period and if the property remains unsold.
Include both homes’ insurance, taxes, community charges and maintenance during the overlap.
Align the contracts
Purchase deposits, completion dates and sale milestones must fit the financing. An independent lawyer should review contractual consequences and the security granted over each property.
The lender also assesses income, debts, age, credit history and the marketability of the existing home. A high apparent equity position does not guarantee approval.
Compare alternatives
Consider selling first with delayed possession, negotiating a longer completion, temporary renting, a conditional purchase or a standard mortgage after sale. The lowest-risk operational route may be better than extra leverage.
RCG Finance can model the financing and compare viable structures. Request a review with both property values, current debt, savings and target dates.
Sources and review
Prepared by the RCG Finance editorial team (RCG 2026 S.L., Bank of Spain register of credit intermediaries no. E760) and reviewed by Rafael, founder of RCG Finance and former debt and M&A advisor at KPMG and PwC, under our editorial standards. Last source review: 8 September 2026.
Frequently asked questions
What if the existing home takes longer to sell?
Payments, deadlines and lender conditions continue. The plan should include a slower sale and lower-price scenario before borrowing.



